His resignation sets off the Ramaphosa era.
Insurance expert says taxpayers will likely foot the bill.
Experts weigh in on the mystery.
The secret craft could have plunged back through the atmosphere.
It's scheduled to begin at 8:00 p.m. EST.
The embattled leader has faced a barrage of accusations of graft after a massive email leak.
A report says the president, cabinet members and some state companies should be investigated over their dealings with wealthy Indian businessmen.